So interesting side bar if OK for a slight thread high-jack...
So I'm on Amazon in the automotive section and have 1978 Jaguar XJS entered for my garage to narrow down selections and lo-and-behold the XJS picture that Amazon is using is @ronbros Jag - pretty cool.

i been sayin that for years!
put any factory stock XJS at a car show beside mine , and just watch the people stop and look and ask questions!
and to think i did that 26years ago!, did i mention its pretty fast also!
steve thanks for lettin me know!

LETS SE THEN!!!! Lots of photos and details of your enhancements :)

pix will never take place of real life, a completely different visual reaction!
cars side by side makes a difference!
where the heck is Derby??

What about the 1990
 

Hello all. This is definitely on my list, too...

Does anyone know what the cut off is. Meaning the relays vs the ECU control? I guess I could and should just go into my doggone 1990 electrical guide, bit thought I would just ask you guru's...

EDIT: I think I found my answer... Thanks for all this info non the less.
https://cimg5.ibsrv.net/gimg/www.jag...05e76699cd.png

Where is the door lock control unit on a left hand drive car? Derby is a place you don't need to know about ;)

Thanks guys

Hi Duke85,

Check out Doug's earlier posts (#11 and #13). There is not a single control unit on your car. There are two relays (lock and unlock) that control the solenoids in your doors.

Cheers,

Ian.

I got it to work in the end! Success!!!!! I figured it out through trial and error :)

All the wires were on the driver side.

Hi,

I have just put this system on my 92 V12, https://www.ebay.co.uk/itm/373097262454 it has nice remotes that just to door open, close.

I just used the security system plug in the boot and was easy once I had worked out which wires to use on the new controller. My car was negative polarity too.

Function / Jaguar harness
Live / Brown
Ground / I used the ground bolt near the light
Lock / Orange/Red
Unlock / Orange/Blue

I couldn't wire up light flash as it works the other way, i.e. it gives a 12v pulse but what you need is it to ground.

Works a treat. Frozen locks in the winter are no longer going to be a problem !

Great well done. Mine is all under the D/S dash as I have an older model. But yes it's really made a huge difference. I use my car daily and this feature really brought the car into the 21st century!